Automated Soil Sampling System for Rapid Slurry Analysis
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Solution Overview
Problem
Existing soil sampling processes are cumbersome and inefficient, requiring drying and grinding of samples before analysis, which complicates the simultaneous and rapid processing of multiple samples for various chemical properties.
Innovation Solution
An automated computer-controlled sampling system that processes agricultural samples, such as soil, in their 'as collected' condition, using a sample preparation subsystem to create a slurry and a chemical analysis subsystem for quantification of analytes, allowing for simultaneous analysis of multiple samples without the need for drying and grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional drying and grinding processes are used for soil samples, then sample preparation thoroughness is improved, but processing time and system complexity increase
Solution Approach 1:
The patent changes the physical state parameters of sample processing by replacing thermal drying with freeze-thaw cycles and mechanical grinding with ultrasonic vibration and high-speed mixing. This transforms the sample preparation approach from thermal-mechanical to cryo-mechanical-ultrasonic, achieving thorough preparation without time-consuming drying and grinding steps
Solution Approach 2:
The patent substitutes traditional mechanical grinding systems with ultrasonic vibration technology and high-speed mixing systems. The ultrasonic probe and rapid mixer effectively break down soil particles and homogenize samples without requiring manual or mechanical grinding, significantly reducing preparation time while maintaining sample integrity
2Measurement precision
If multiple samples are processed sequentially through traditional methods, then analysis accuracy is maintained, but productivity decreases
Solution Approach 1:
The patent divides the sample processing system into independent parallel channels, each capable of handling one sample simultaneously. Multiple extraction cells, reaction vessels, and analysis modules operate in parallel, allowing sequential accuracy to be maintained while enabling simultaneous processing of multiple samples to dramatically increase throughput
Solution Approach 2:
The patent implements continuous automated workflows where sample preparation, extraction, reaction, and analysis occur in continuous streams rather than batch processes. The automated liquid handling systems and continuous flow reactors eliminate idle time between operations, maintaining analytical precision while maximizing productivity through uninterrupted processing
3Productivity
If automated systems are implemented for soil sampling and analysis, then productivity and speed are improved, but device complexity increases
Solution Approach 1:
The patent designs automated modules that perform multiple functions within single integrated units. For example, the extraction system handles both solid-liquid extraction and liquid-liquid extraction across different sample types (soil, vegetation, manure), and the analysis system can measure multiple analytes simultaneously. This multi-functionality reduces the number of separate devices needed, managing complexity while maintaining high productivity
Solution Approach 2:
The automated system incorporates self-regulating features including automatic reagent dispensing, self-cleaning mechanisms, and automated data processing. The system monitors and adjusts its own operations, reducing the need for complex manual control systems and simplifying the overall device architecture while maintaining high-speed automated processing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and efficient analysis of multiple agricultural samples for chemical properties like plant-available nutrients, improving the accuracy and speed of soil testing and reducing the complexity of sample preparation.
Implementation Method 1
measuring a density of the slurry with a density measurement device
Implementation Method 2
a recirculation flow loop fluidly coupling the mixing device and the coarse filter unit
Implementation Method 3
coarse filter unit configured to remove oversized solid particles from the slurry
Data Source
AI summary
A double diaphragm slurry pump (7080) comprises: a pump body (8200) defining a vertical longitudinal axis (LA) and first (8201) and second (8202) pumping chambers; an inlet flow manifold (8203) and an outlet flow manifold (8204) coupled to the pump body; a first pump head (8230a) coupled to the body adjacent the first pumping chamber, the first pump head comprising a longitudinal flow bore (8231) separate from the first pumping chamber and fluidly coupled to the inlet and outlet flow manifolds, an upper air vent bore (8232), and a lower slurry exchange bore (8233), the upper air vent bore and lower slurry exchange bore each fluidly coupling the longitudinal flow bore in turn to the first pumping chamber; and an operating shaft (8240) coupled to a resiliently deformable diaphragm (8241) disposed in the first pumping chamber; wherein the shaft is moveable in a pump stroke to pump a fluid through the longitudinal bore of the first pump head and the first pumping chamber from the inlet flow manifold to the outlet flow manifold; and wherein the upper air vent bore (8232) is smaller in diameter than the lower slurry exchange bore (8233) such that air is preferentially ejected from the first pumping chamber rather than slurry during the pump stroke.